Did he return the bust? The article on Drudge says Obama merely moved it to his personal residence in the WH.
It defies belief that King Barack didn't move it out of spite. Obama most likely detests Churhchill and other colonial Brits. If he took it out of the Oval Office and put it in his room, it's probably in a closet. He probably takes it out to thrown darts at it from time to time.